Fix bugs around manager fetching.

A recent patch started returning "null" when a Binder service
required to provide a manager wasn't yet registered.

This fixes four locations where that new logging was triggered: in
two cases by adjusting the fetching ordering, and in two other cases
by only fetching when the device supports the manager.

Bug: 28634953
Change-Id: I84dbccffa4ac760c10a2bbcb234f21272bfecb91